Island



No. 6|5,877. Patented Dec. 13, I898.

J. J. McARDLE.

NUT LOCK.

Application filed. June 8, 1898A WITNESSES. mw.m{bzzfi% JAMES J.MOARDLE, OF PAW TUOKET, RIIODE ISLAND.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 615,877, dated December13, 1898.

Application filed June 8,1898. Serial No. 682,918- (No model.)

To all whom it may concern:

Be it known that I, JAMEs J. MCARDLE, of Pawtucket, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Nut-Locks; and I hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

This invention has reference to an improvement in nut-locks forrail-joints; and it consists in the peculiar and novel construction of abar which, forming the washers for two bolts, has the end formed to acton the two nuts as a look, as will be more fully set forth hereinafter.

Figure 1 is a perspective view of my improved nut-lock. Fig. 2 is a sideview of a two-bolt rail-joint provided with my nut-lock. Fig. 3 is a topview, and Fig. 4 a transverse sectional View, of the same.

In the drawings, a a indicate the rail ends; I) b, the fish-plates.These may be of any of the usual forms used to unite the end of therails, bars, or plates together. a c are the headsof the screw-bolts cld, and e c the nuts.

The nut-lock is formed of a preferably rectangular barf, the ends ff ofwhich are of gradually-diminishing thickness andincreasing width,forming fishtail shaped ends. The bar is bent, usually while hot, arounda pin to form the eyes f f and the ends are bent so as to bring thefishtail ends ff in the position to bear on the nuts. The centralportion of the bar f is bent to extend from one side of one of the eyesf to the opposite side of the other eye, with or without the rectangularconnecting-piece The tail ends f f are bent so as to bring the plane oftheir surfaces oblique to the plane of the rest of the barf and to thefish-plates.

In using my improved nut-lock the eyes f f are passed over the bolts 01(Z, so as to bear on the fish-plate b. The nuts 6 e are now placed onthe bolts, and, turning on the screwthread of the bolts, the corners ofthe nuts encounter the oblique surfaces of the tail ends ff, which,owing to the bendsf f and the resiliency of the metal, yield to themovement of the corners of the nuts, but bear on the sides of the nutsand hold the same in the adjusted position. The port-ion of the barfextending around the bolts forms substantial washers for the nuts 6 e.The resiliency of the metal is readily secured by quickly cooling thenutlock after it has been bent while heated, and while the nuts arefirmly held in the adjusted position against jars, accidental blows, orvibrations the nuts can be turned with awrench to tighten or loosen thesame. The tail ends will yield to the corners of the nuts'in turning thesame backward in loosening the nut, but not as readily as they willyield, owing to their oblique surfaces, in turning the nut forward totighten the same.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A nut-lock, consisting of the barf bent to form thetwo eyes f f the bendsf f and the ends f f, the surfaces of the ends ffbeing oblique to the plane of the nut-lock, as described.

2. In a nut-lock, the combination with the fish-plate b, the bolts d cland the nuts e e, of the bar f having the eyes f f the ends f f and thetail ends ff the plane of the wide surfaces of which are oblique to theplane of the fish-plate, said tail ends f f bearing on one side of thenut of one bolt and the opposite side of the nut of the other bolt;whereby the tightening up of the nuts is facilitated and the nuts areheld against jars in their adjusted positions, as described.

In witness whereof I have hereunto set my hand.

JAMES J. MCARDLE.

Witnesses:

GEO. H. READ, J osEPH A. MILLER, J r.

